Hello so i baisicly have a cube pilot as the brain of the boat and i have calibrated the radio and the the next step would be to calibrate and connect the motors in order to start but i can’t seem to figure that out if you guys can help me with that thank you in advance!
Hi @Rares7070, welcome to the forum 
I don’t have experience with the CubePilot, but it should have similar connection requirements to any other flight controller board. You’ll need to connect its main outputs to the signal wires of the ESCs you’re using, so they can control your thrusters.
If you’re using ArduRover as your firmware, you may wish to go through the rover setup instructions, so you have some steps to guide you. If you get stuck you can share what step you’re up to, as well as how your hardware is connected (ideally with pictures) and how your autopilot is configured, and we can potentially help you determine what’s going wrong.